@inproceedings{CHI-1990-FischerG,
	author        = "Gerhard Fischer and Andreas Girgensohn",
	booktitle     = "{Proceedings of the Eighth ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/97243.97272",
	isbn          = "0-201-50932-6",
	pages         = "183--192",
	publisher     = "{ACM}",
	title         = "{End-user modifiability in design environments}",
	year          = 1990,
}